Forex is the global market where people and institutions trade one currency for another

Forex stands for "foreign exchange." It is the system through which currencies change hands — when a business in Japan pays a supplier in Germany, when a traveler exchanges dollars for euros at an airport, or when an investment fund bets that the British pound will rise against the Canadian dollar. The forex market is where those trades happen, and it runs around the clock across major financial centers in Tokyo, London, Frankfurt, New York, and Sydney.

Unlike a stock exchange, which has a physical location and set trading hours, forex is a decentralized network. Banks, currency dealers, hedge funds, corporations, and individual traders connect through electronic systems and phone lines. There is no single "forex exchange" — instead, trades happen directly between two parties, usually through a broker or a bank. The market moves on supply and demand: if many people want to buy euros and few want to sell them, the euro's price rises.

The forex market is the largest and most liquid financial market in the world. Trillions of dollars worth of currency trades hands every day. That size means prices move quickly, spreads (the difference between buy and sell prices) are usually tight, and you can enter or exit a position almost when ready during market hours.

Key Takeaways

  • Forex is where currencies are traded, and it operates as a decentralized global network rather than a single physical exchange.
  • Currencies are always quoted in pairs — such as EUR/USD (euros per dollar) — because you are always buying one currency and selling another at the same time.
  • The forex market runs 24 hours a day, five days a week, because it follows the sun across financial centers in different time zones.
  • Forex trading involves leverage, which means you can control a large position with a small deposit, but leverage also magnifies losses as well as gains.
  • Most individual traders use a broker to access the forex market, and brokers vary widely in regulation, fees, and the tools they provide.

How currency pairs work in forex

In forex, you never trade a single currency in isolation. You always trade a pair — one currency against another. The pair is written with a slash: EUR/USD means euros per US dollar. When you see EUR/USD quoted at 1.10, that means one euro costs 1.10 US dollars.

The currency on the left side of the pair is the base currency. The currency on the right is the quote currency. If you buy EUR/USD at 1.10, you are spending 1.10 dollars to get one euro. If you sell EUR/USD at 1.10, you are giving up one euro to get 1.10 dollars. Every trade is simultaneous: you cannot buy euros without selling dollars, and you cannot sell euros without buying dollars.

The most heavily traded pairs involve the US dollar paired with major currencies: EUR/USD, GBP/USD (British pounds), JPY/USD (Japanese yen), and USD/CAD (Canadian dollars). Pairs that do not include the dollar, such as EUR/GBP, are called "cross pairs" and usually have wider spreads because fewer traders are active in them.

The 24-hour trading schedule and market sessions

Forex trades around the clock because financial centers operate in different time zones. When New York closes, Tokyo opens. When Tokyo closes, London opens. This continuous cycle means you can trade at almost any hour, but volume and volatility change depending on which session is active.

The major sessions are the Asian session (Tokyo, Hong Kong, Singapore), the European session (London, Frankfurt), and the North American session (New York). The busiest times are usually when two sessions overlap — for example, when London and New York are both open, or when London and Asia overlap. During quiet sessions, spreads widen and prices move more slowly.

Forex markets close on weekends. Trading halts Friday evening in New York and resumes Sunday evening in Tokyo. This gap means that if major news breaks over the weekend, the market cannot react until Sunday night, and the opening price on Sunday may jump sharply from Friday's close.

Leverage and how it changes the risk in forex

Most forex brokers offer leverage, which lets you control a large position with a small deposit. Leverage is expressed as a ratio: 50:1 leverage means you can control $50,000 in currency with a $1,000 deposit. This amplifies both gains and losses. A 1% move in the currency pair becomes a 50% move in your account balance.

Leverage is attractive because it lets you trade with money you do not have on hand. But it is also dangerous. A small adverse move can wipe out your entire deposit and leave you owing the broker money. Regulatory bodies in different countries set different leverage limits — the United States allows up to 50:1 for major pairs, while some other countries allow much higher ratios.

Many beginning traders underestimate leverage risk because they focus on the potential gain and not the potential loss. A position that seems small — say, 0.1 lots of EUR/USD — can still represent tens of thousands of dollars in notional value when leverage is applied. Before you trade, you should understand exactly how much money you can lose on each trade and whether that amount fits your risk tolerance.

Spreads, pips, and how brokers make money

A spread is the difference between the bid price (what a broker will pay you for a currency) and the ask price (what the broker will charge you to buy it). If EUR/USD is bid at 1.0950 and asked at 1.0952, the spread is 0.0002, or 2 pips. A pip is the smallest unit of price movement in forex — usually 0.0001 for pairs quoted to four decimal places.

Spreads vary depending on the pair, the broker, and market conditions. Major pairs like EUR/USD usually have tight spreads of 1 to 3 pips during busy sessions. Exotic pairs or pairs traded during quiet sessions may have spreads of 10 pips or wider. Brokers make money by keeping the spread — when you buy at the ask and sell at the bid, the difference goes to the broker.

Some brokers charge a commission on top of the spread, while others make money only from the spread. A broker with a 1-pip spread and a $5 commission per lot may be cheaper or more expensive than a broker with a 3-pip spread and no commission, depending on how often you trade. Understanding the total cost of trading with a particular broker is important before you open an account.

Who trades forex and why

Forex traders fall into several categories. Central banks trade to manage their currency's value and implement monetary policy. Corporations trade to hedge currency risk — a US company that earns revenue in euros might sell euros forward to lock in a known dollar amount. Hedge funds and investment firms trade to profit from currency movements. Money changers and travel companies trade to meet customer demand for foreign currency.

Individual traders make up a small fraction of total forex volume, but the number has grown as brokers have made retail trading more accessible. Individual traders trade for many reasons: some try to profit from short-term price swings, some hedge personal or business currency exposure, and some treat it as a form of speculation or gambling.

The motivations matter because they affect how you should approach forex. If you are hedging a real business need — such as paying a supplier in another currency — your goal is to lock in a known cost, not to maximize profit. If you are speculating, you are betting that your forecast of currency movement is better than the market's, which is a difficult and risky proposition.

How forex differs from stocks and bonds

Forex is fundamentally different from stock or bond markets in several ways. Stocks represent ownership in a company and can pay dividends. Bonds are loans that pay interest. Currencies have no intrinsic cash flow — they are useful only because other people want them. The price of a currency depends entirely on supply and demand and on expectations about future economic conditions.

Forex also moves much faster than stocks. A stock might move 2% in a day and be considered volatile. A currency pair can move 2% in an hour. This speed creates opportunity for traders who can react quickly, but it also creates risk for traders who are not paying attention or who do not understand what they own.

Another difference is leverage. Stock brokers typically offer 2:1 leverage for margin accounts. Forex brokers offer much higher leverage — often 50:1 or more — because currency prices are less volatile than stock prices in percentage terms. But higher leverage means higher risk, and many individual traders lose money in forex because they use leverage without fully understanding it.

Frequently Asked Questions

What is the difference between forex trading and currency exchange at an airport?

Airport currency exchange is a one-time transaction where you convert one currency to another at a fixed rate set by the exchange company. Forex trading is speculative — you buy a currency expecting its price to rise, then sell it later at a higher price. Airport exchanges charge large markups (often 5% to 10%) because they are convenient. Forex brokers charge much smaller spreads because volume is high and competition is fierce.

Can I make money trading forex?

Yes, some traders do make money, but most individual traders lose money. Forex requires skill, discipline, and a realistic understanding of risk. You are competing against banks, hedge funds, and professional traders with better tools and information. Before you risk real money, you should practice on a demo account, develop a trading plan, and understand exactly how much you can afford to lose.

Is forex trading regulated?

Forex brokers are regulated in most countries, but the level of regulation varies widely. In the United States, forex brokers must be registered with the Commodity Futures Trading Commission (CFTC) and the National Futures Association (NFA). In Europe, they must be licensed by their national financial authority. Regulation provides some protection against fraud, but it does not prevent you from losing money through bad trades.

What is the minimum amount I need to start forex trading?

Some brokers allow you to open an account with as little as $100 or even $10, but that does not mean you should. With leverage, a small account can be wiped out by a single bad trade. Most experienced traders recommend starting with at least $1,000 to $2,000 so that a single loss does not eliminate your entire account. The real question is not how little you can start with, but how much you can afford to lose.

What time of day is best for forex trading?

The best time depends on which currency pairs you trade and your trading style. Major pairs like EUR/USD are most liquid and have the tightest spreads during the London and New York sessions. If you trade exotic pairs or cross pairs, you may find better spreads during the Asian session when those currencies are actively traded in their home markets. If you are a day trader, you need high volume and tight spreads, so you should trade during overlapping sessions.